Index: Makerules
--- Makerules.orig
+++ Makerules
@@ -92,7 +92,7 @@ ifeq ($(build),debug)
   CFLAGS += -pipe -g
   LDFLAGS += -g
 else ifeq ($(build),release)
-  CFLAGS += -pipe -O2 -DNDEBUG
+  CFLAGS += -DNDEBUG
   LDFLAGS += $(LDREMOVEUNREACH) -Wl,-s
 else ifeq ($(build),small)
   CFLAGS += -pipe -Os -DNDEBUG
@@ -180,9 +180,9 @@ else ifeq ($(OS),MACOS)
     endif
   endif
 
-else ifeq ($(OS),Linux)
+else ifneq (,$(filter $(OS),Linux OpenBSD))
   ifeq ($(PYODIDE_ROOT),)
-    HAVE_OBJCOPY := yes
+    HAVE_OBJCOPY ?= yes
   else
     # Pyodide's ld does not support -b so we cannot use it to create object
     # files containing font data, so leave HAVE_OBJCOPY unset. And we need